PMID: 15376680Sep 21, 2004Paper

Monaural and interaural intensity discrimination: level effects and the "binaural advantage"

The Journal of the Acoustical Society of America
Mark A StellmackAndrew J Byrne

Abstract

This study examined whether the level effects seen in monaural intensity discrimination (Weber's law and the "near miss") in a two-interval task are also observed in discrimination of interaural intensity differences (IIDs) in a single-interval task. Both tasks were performed for various standard levels of 4-kHz pure tones and broadband noise. The Weber functions (10 log deltaI/I versus I in dB) in the monaural and binaural conditions were parallel. For noise, the Weber functions had slopes close to zero (Weber's law) while the Weber functions for the tones had a mean slope of -0.089 (near miss). The near miss for the monaural and binaural tasks with tones was eliminated when a high-pass masker was gated with the listening intervals. The near-miss was also observed for 250- and 1000-Hz tones in the binaural task despite overall decreased sensitivity to changes in IID at 1000 Hz. The binaural thresholds showed a small (about 2-dB) advantage over monaural thresholds only in the broadband noise conditions. More important, however, is the fact that the level effects seen monaurally are also seen binaurally. This suggests that the basic mechanisms responsible for Weber's law and the near miss are common to monaural and binaural proc...Continue Reading

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Citations

May 9, 2008·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Daniel J TollinJeffrey J Tsai
Nov 4, 2005·The Journal of the Acoustical Society of America·Mark A StellmackAndrew J Byrne
Jul 19, 2013·The Journal of the Acoustical Society of America·Mathias DietzVolker Hohmann
Sep 18, 2012·The Journal of the Acoustical Society of America·G Christopher Stecker, Andrew D Brown
Dec 13, 2005·The Journal of the Acoustical Society of America·Mark A StellmackAndrew J Byrne
Oct 12, 2007·The Journal of the Acoustical Society of America·Mark A StellmackAndrew J Byrne
Jun 22, 2015·The Journal of the Acoustical Society of America·Michael R D MaslinKevin J Munro
Dec 3, 2017·The Journal of the Acoustical Society of America·Bernhard LabackPhilip Joris
Apr 11, 2019·ELife·Dmitry KobakAlfonso Renart
Aug 14, 2019·Nature Neuroscience·Jose L Pardo-VazquezAlfonso Renart
Aug 30, 2006·International Journal of Audiology·Michael A Akeroyd
Jan 13, 2021·Scientific Reports·Mark D FletcherSamuel W Perry

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